Brick or block for regenerators



K. KNIEPERT BRICK 0R BLOCK FOR REGENERATORS April 8, 1930.

Filed Feb. 11, 1928 ziucnfor- Mr! Yuk oer! Patented Apr. 8, 1930 UNITED STATES KARL KNIEPERT, or VIENNA, hus'rrtm BRICK on BLOCK roR-nEeENERAT'oBs Application filed. February 11, 1928, Serial No. 253,698, and in Austria-February '19, 1927. I

This invention relates to improvements in bricks or blocks for regenerators (recuperators, hot blast arrangements) for instance in connection with blast-furnaces or open hearth a furnaces. Such brickwork should provide the largest possible free heating surface and possess stability and should consist of durable although inexpensive blocks or bricks and be designed to produce eddies in the melo dium circulation through the regenerator. Heretofore these requirements could not all be fulfilled together. In order to obtainthe maximum heating area, it has been proposed to make the thickness and height of the bricks and the space therethrough as small as possible. However, when employing the common prismatic moulded brick, the stress or strain, particularly on the lower or bottom courses, is too great and the stability of the regenerator structure is reduced. In order to produce eddies, the blocks had to'be staggered. This also reduces the stability of the regenerator structure and gives less free space through the structure when looking down vertically through it.

Another object of the invention is to provide a checkerwork of this character wherein the vertical passages are so arranged that the gases will pass through a maximum number thereof, thereby reducing the number of dead or unused passages to a minimum, or approximately less than with the ordinary brickwork.

The brick or block according to the present invention satisfies all the above requirements and is characterized by the fact that some or all of its side faces are inclined to the vertical. According to a preferred embodiment, the brick or block consists of a four-sided inclined hollow prismatic member. V

The subject matter of the invention is illustrated by way of example on the accompanying sheet of drawings in which Fig. 1 is a perspective View of the mode of arranging the bricks.

Figs. 2 and 3 show in sectional elevation and plan view respectively the arrangement of hollow prismatic bricks in which two sur- 50 faces are inclined.

'Figs. 4 and 5 illustrate iii-section'akelevati-on and plan view respectively the "arrangement of verticalholl'ow prismatic bricksjof the same base and height, in order to explain the advantages of the inclined surfaces.

Fig.1 6 is plan view "of a use; or brick a four-sided inclined hollow prismatic'member. 7' i V v The bricks or blocks, illustrated in Figs. 1 and 2, consist o'fhollow rismaticmembers 7 provided with a'squa're base and two inclined surfaces and with slightly rounded inside and outside-edges. The hollow space is of square crosssectional area, the lengthofone side corresponding to one-third part of "the length of the base of the brick and the hollow space being symmetrically arranged. The bottom faces of the bricks in the first,

third'an'd fifth courses and so on, as well as those of the second, fourth and sixth courses and, so on, overhang, this belng also the case with respecttothe top faces, in consequence of the shape oft he bricks or stones. Thus, as

' shown in Fig. 2, this imparts a sufiicientstawith all the surfaces-inclined and'formed'by bility to therege'nerator brickwork. The

medium passing in the direction 'oft'he'arrows (Fig. 2)"1neets at the base of everythird brick course a large bathe-surface of (Figs.

and 3) ,the' width of "which 'isindic'ate'ol by the base-line of the triangle shown in dotted lines. The clear through space (indicated by parallel 'das'h dotted lines), ierlr'i'aiiijing on looking through in a vertical direction, is reduced by only one half of the value a, corresponding to the upper half of the trience to Figs. 3 and 5, wherein the bafie-surangle. The advantage obtained thereby is I faces a are indicated by hatchings and the through spaces are designated with the characters b and b respectively.

The battle-surfaces may be increased without altering the stability of the brickwork if the brick is in the shape of a hollow prismatic member with four inclined surfaces (Fig. 6).

The brick or block constructed according to the present invention is inexpensive, its resistance is increased and therefore it-can be small size although the heating area of the brickwork is large. The stability of the brickwork is very great and the bafl le-sur & faces arelarge in-order to produce eddies,

whilst the through space is only slightly reduced. A further advantage is that there is a clear through draught through the brickwork.

'I claim 1. A checkerwork for regenerators' and the like, comprising courses of oblique parallelopipedic blocks each having a vertical opening therethrough of a shape corresponding to that of the block, the courses being staggered with respect to adjacent courses whereby a comparatively large portion of the upper face of each block is exposed through the opening of a block of the course above, so as to induce an eddy of the gases thereon, and to produce comparatively large vertical gas passages through the checkerwork. I

2. A checkerwork for regenerators and the like, comprising courses of blocks each block of which has a vertical opening of oblique parallelopipedic shape, each course being arranged in staggered relation to the adjacent courses to produce continuous oblique gas passages, whereby to induce a flow of gases through the maximum number of said passages, with the minimum of dead or unused passages.

3. A checkerwork for regenerators, and the like comprising courses of oblique parallelopipedic blocks, each block having a vertical parallelopipedic opening therethrough, the courses being staggered with relation to each other with the maximum of the upper face of each block exposed at the bottom of the opening of a block above, and a minimum reduction in the size of the passages through the blocks, whereby to produce a flow of gases through all of the passages except a very small percentage thereof.

In testimony whereof I have signed by name to this specification.

' KARL KNIEPERT. 

